The first step in the development of anal fistula in infants and young children is a perianal abscess, a pustule bulging around the anus, local redness, swelling and pain, the pain decreases after the abscess breaks down, the ruptured mouth is constantly flowing pus, the outer mouth is sometimes closed and sometimes collapsed, the inner mouth is not closed after the outer mouth is closed, it is easy to re-infection. The abscess is an anal fistula when it breaks down. The fistula is usually low, with three parts: the inner mouth (inside the anus), the outer mouth (the ulcerated mouth on the perianal skin), and the tube, which connects the inner and outer mouths. The fistula cream should be injected into the anal canal, because the fistula canal is short and the cream may overflow from the anus, if you don’t use toilet paper to wipe the cream thoroughly, it is easy to pour into the canal from the outer mouth of the fistula, the role of the fistula cream is to make the inner mouth closed, cutting off the source of infection, so that bacteria can not invade, the outer mouth should be left open, so that the inflammatory secretions in the canal can be excreted, so that the inflammation of the fistula can The purpose of the treatment is to slowly subside the inflammation. A girl’s rectovaginal fistula was treated with anal fistula cream for nearly three months, and the effect was obvious, and treatment is continuing. The parents sometimes ask: what is the best way to apply cream to the external mouth of the anal fistula, but I think the external mouth should not be coated with any medicine, so that the patient will not have pain by leaving the mouth open to discharge. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things.